增量动力分析中地震动强度参数的有效性研究

发布时间：2018-04-27 13:23

本文选题：增量动力分析 + 地震动强度参数　；参考：《西安建筑科技大学学报(自然科学版)》2016年06期

【摘要】：分别对一6层规则框架、一规则超高层和一不规则超高层结构进行增量动力分析,以峰值加速度PGA、峰值速度PGV、峰值位移PGD、弹性加速度谱S_a(T_1)、速度谱S_v(T_1)、位移谱S_d(T_1)、Cordova等提出的参数S*以及周颖等提出的参数S12和S123为地震动强度参数,所有楼层的最大层间位移角为工程需求参数,通过对数空间的线性回归,以系数R~2为指标,对比分析这些参数的有效性.结果表明,反应谱参数的有效性均优于PGA;PGD有效性最差;对规则结构,S*的有效性高于S_a(T_1)和PGA;对不规则结构,低于S_a(T_1)但高于PGA;对考虑高阶振型影响的地震动强度参数,考虑振型数越多,有效性越高;对超高层结构,PGV的有效性最好;而对6层框架,PGV的有效性仅次于S*,显著高于其他参数.
[Abstract]:An incremental dynamic analysis of a 6-story regular frame, a regular super-tall structure and an irregular super-tall structure is carried out respectively. Taking the parameters of peak acceleration PGA, peak velocity PGV, peak displacement PGD, elastic acceleration spectrum Saad _ T _ 1, velocity spectrum _ s _ _ _, _ _ _ and the parameters S * and S _ (123) presented by Zhou Ying The maximum interstory displacement angle of all floors is the engineering demand parameter. By linear regression of logarithmic space, the efficiency of these parameters is compared and analyzed with the coefficient R2 as the index. The results show that the validity of the response spectrum parameters is the worst than that of PGAPGAPGD, the validity of S * for regular structure is higher than that for Sasp _ T _ 1) and PGA; for irregular structures, it is lower than SaStud _ T _ (1) but higher than PGA; and for ground motion intensity parameters considering the influence of high-order modes, The higher the number of modes is taken into account, the higher the validity is, and the better the validity is for super-tall structures, while the higher the efficiency for 6-story frames is, the higher than the other parameters.
【作者单位】：西安建筑科技大学土木工程学院;同济大学土木工程防灾国家重点实验室;华陆工程科技有限责任公司;
【基金】：国家自然科学基金资助项目(51408456) 西安建筑科技大学科技计划基金资助项目(RC1428) 西部建筑科技重点实验室人才基金资助项目
【分类号】：TU311.3

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